Vacuum tube



A ril 12, 1927. 1,624,331

F. R. GEYSER vacuum TUBE Filed March 19, 1924 A; ATTORNEY Patented Apr. 12, 1927.

UNITED STATES Y PATEN FRANK R. GEYSER, OF NEW YORK, N; Y.

- VACUUM TUBE.

Application filed March 19, 1924. Serial No. 760,423.

This invention relates to a vacuum tube, similar to the well-known X-ray tube and adapted for use in the same general manner for the treatment of certain skin affections, and for other similar purposes which require the direct application of the window end of the tube against the parts.

An object of the invention is to provide a tube of this type having the contact surface of its window end made of such contour that when being applied to a surface to be treated it may be moved from one point of application "to another adjacent point and then to another, and so on, and thus be made to cover substantially the entire expanse of surface without necessity for any lapping of treatments and with a greater degree of certainty upon the part of the operator that the entire affected surface has been covered than has been pos sible with the usual circular Window end heretofore employed. 7 V

A further object is to so design the window end portion of the tube that substantially all portions of the contact surface shall be effective for imparting proper treatment to the affected parts.

Other objects and aims of the invention, more or less specific than those referred to, will be in part obvious and in part pointed out in the following description of the ele ments, combinations, arrangements of parts, and applications of principles constituting thc invention and the scope of protection contemplated, will be indicated in the appended claims.

In the accompanylng drawlngs which are to be taken as a part ofthis specification,

and in which I have shown only a preferred.

form of embodiment of the invention:

Figure 1 is a perspective .viewofa vacuum tube constructed in accordance with this invention, and i Figure 2 is a bottom plan view of the window end seen in Figure 1, and illustrating in dotted lines the manner in which the tube would be moved from one point to another for properly treating the full expanse of an affected surface.

Referring to the drawings for describing in detail the structure therein shown, the reference character L indicates the main or body portionv of the tube, having the opposite extensions G and H. for carrying the electrodes for the attachmentcf conductors. Y

' A-suitable handle 1 extends laterally from the vertical extension part 2 at the top of he body 'L, and by means of this handle the entire device may be readily manipulated in use. This handle is preferably attached to the extension 2 below the top end of sald extension as ll} has been found that greater strength and convenience can be secured by this arrangement.

'While the upper portion as 3 of the body,

L has the usual globular form, it is, proposed by the present invention that the lower or window portion as 4 shall be of rectangular form, that the bottom or contact surface as 5 shall be ofsubstantially square contour, and that the Walls of the window portion shall be tapered gradually upwardly and outwardly in all directions-to merge with the upper portion 8. In this way not only is the contact surface 5 of the window given the desirable contour mentioned but the interior of the body and window portion is left free of any inward perturbances which would interfere with the free downward passage of rays to and through the window.

The manner of use of this device is clearly illustrated in Figure 2 wherein it is suggested that the irregular line indicated by the reference numeral 6 indicate the extent of the affected surface which it is desired to treat. In treating this surface the operator places the window 5 of his bulb against the surface, for instance in the'position indicated by the full line'illustration in this figure. Aftera desirable lapse of time he then moves the window to an adjacent position, as for instancethat illustrated by the dotted line representation of the window.

by all of the dotted line representations of s the window have been treated.

lVith proper care and attention on the part. of the operator it will be quite possible for him to cover the entire affected surface in this way in a minimum of time and without the probability of any lap of treatments;

and in order that this point may be made.

more apparent it will be here mentioned that if the window 5 be made of circular contour,

as has been the practice heretofore, there would necessarily be largeuntreated sur faces at the center each four points at treatment. These untreated niurl 'zures would require subsequent treatment which would of course result in double treatment where the subsequent treuti'uents overlap the first.

As many changes can he nuide in this eonstruetion without departing from the scope ol' the invention defined in the Following claims it is intended that all limiter eon mined in the above description or shown in the accompanying drawings shall be interpreted us illustretive onl and not in :1 limiting sense.

Having thus dewi'iluad the invention what I claim as new and desire to seeure Letters Patent is:

1. A vacuum lube ol' the type indicated having a window portion ui'lii jited to be moved about on eliliet'ed surface for treating said surfnee the eonteel' surtuee of suid Window portion living of subutiu'itiully nquni'e (-oiitour whereby to avoid noi'essity for overlapping treatment of any portion oi? the :rllliel'ed surface while yet enabling treatment of the entire afiiieted surface as and in the manner set forth.

2. A. vacuum tube of the type .iudiouled comprising: the HEBHHl relatively large globulur body part and a downnuu'iflly extending reliitivel smallv window end portion, said window end portion being of rectangular form. the contact surface thereol" being of sulilstiintinlly square ronl'our, and the side walls thereof tapering gradually upwurdli and outwuri'lly to merge inlo the globular portion of the body, for the purpose set forth.

in testimony whereof I. allix niy signature.

FRANK R. GEYSER. 

